Raphaël Oleo brushes feature carefully selected hog bristles. Oleo brush bristles are of high quality, more elastic and more resistant than traditional hog's bristles, thus providing better control in use. These bristles are whitened, heat treated for two hours and specially conditioned. They are renowned for their finesse.Details:FlatAvailable in assorted sizesHog bristlesIdeal for use with oil, gouache, gesso and varnishes